<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
   <script>
    // let s = Symbol;
    // let b =NaN;
    // console.log(s===b);




    // let obj = {
    //          name:"张三",
    //          age:20,
    //          [Symbol()]:"100kg"
    // }
    // console.log(obj);



    let cate = {
    person:Symbol(),
    animal:Symbol()
}
function getCate(type){
    if(type===cate.person){
        console.log("英雄联盟")
    }else{
        console.log("王者荣耀")
    }
}
// getCate(cate.person);
getCate(cate.animal);
   </script>
</body>
</html>